O.S. Speed R2105 Engine (OSMG2028)

OS Speed R2105 on-road engine is a high-performance powerplant from O.S. Speed designed for competitive, high-grip track racing. It uses a newly designed 9-port sleeve to boost torque and a DLC-coated crankshaft that provides linear power from low RPM to top end, enabling confident acceleration and smooth power delivery across the rev range.

Additional updates include a silver-finish head and a steel thrust plate that reduce wear between the connecting rod and cover plate, extending engine life. A redesigned crankcase mold carries the O.S. Speed branding, and a two-piece needle O-ring helps prevent needle adjustments from drifting, ensuring stable tuning. Together, these features position the R2105 as a flagship-level on-road engine suitable for demanding, high-grip racing conditions.